Hi!
Eric note interesting thing: NUL driver in BC kernel placed further,
than in Watcom kernel. After some investigations I found, that this is
because libm.lib, which exports from standard library some modules. For
example, map file for BC:
______________O\_/_________________________________\_/O______________
Start Stop Length Name Class
00000H 000FFH 00100H PSP PSP
00100H 002D9H 001DAH _LOWTEXT LCODE
[...]
006ECH 007F2H 00107H _TEXT LCODE
>-^^^---------^^^^^---------------------^^^^^
00800H 012AFH 00AB0H _FIXED_DATA FDATA
[...]
01E70H 0D8A9H 0BA3AH HMA_TEXT CODE
>---------------------------------------^^^^
[...]
0010:05B8 LptTable
0010:05EC N_LDIV@
>--^^^^^^^ =0:6EC
0010:05EF LDIV@
_____________________________________________________________________
O/~\ /~\O
Watcom:
______________O\_/_________________________________\_/O______________
PSP PSP PGROUP 0000:0000 00000100
_LOWTEXT LCODE LGROUP 0010:0000 000001da
[...]
_TEXT LCODE LGROUP 006e:000b 00000000
>----------------------^^^^^-------------------------------------^^^^^^^^
[...]
HMA_TEXT CODE TGROUP 01d6:0000 0000a0e6
>----------------------^^^^--------------------------^^^^
[...]
01d6:0000 __HMATextStart
01d6:0031 _DGROUP_
01d6:0033 __U4M
>^^^
01d6:0049 __U4D
_____________________________________________________________________
O/~\ /~\O
Another fact: lib/makefile with help of patchobj replaces in .obj files CODE
by LCODE, thus, in theory, all included from standard library files should
come into low memory (group LGROUP), as in BC, whereas in Watcom i4m.obj
from libm.lib placed into group TGROUP, segment HMA_TEXT with class CODE
(not LCODE). Why? Why patching .obj files in lib/makefile is ignored?
PS: On the other side, why standard modules should come into lower memory?
Why not place them all into HMA_TEXT? Lucho, may you recompile kernel by BC
with:
- segs.inc: segment _TEXT in group TGROUP (after HMA_TEXT_START) and with
class CODE;
- lib/makefile: no patching .obj files.
? I myself can't do this, because my system is not completely restored.
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